Hot-air heater



March 8, 1955 A. c. HASS HOT-AIR HEATER Filed se t. 9, 1952 INVENTOR. Albert 6. Haas ATTD RN EYE United States Patent HOT-AlR HEATER Albert C. Hass, Elmhurst, Ill.

Application September 9, 1952, Serial No. 308,641

1 Claim. (Cl. 126-110) This invention relates to heaters or furnaces for hot air heating plants, and in particular a housing formed in two sections with a burner in one section and a fan in the other and in which the upper ends of the sections are formed on 45 degree angles or in the shape of a V whereby with the section in which the fan is positioned providing a cold air return and the section in which the burner is positioned providing a heating chamber for delivering hot air to ducts an improved hot air heater is provided.

The purpose of this invention is to expedite circulation in a hot air heater whereby air from a cold air return is circulated through a heating chamber and directed by diagonally positioned surfaces to heating ducts that extend throughout a building or the like.

With the conventional type of heater where the top of the housing is flat or horizontally disposed the hot air accumulates in a pocket and heating is accomplished by reflecting heat units from the upper end of the housing downwardly. The efiiciency of heaters of this type is comparatively low. With this thought in mind this invention contemplates a heater having a housing in which the under surface of the top slopes from the center in two directions whereby, instead of forming a pocket in the upper end of the housing, the hot air passes directly into air ducts through which the hot air is conveyed to rooms or other enclosures.

The object of this invention is, therefore, to provide means for forming a hot air heater whereby cold air is returned to the heater and the hot air discharged therefrom with the highest possible efliciency.

Another object of the invention is to provide an improved hot air heater through which air is circulated with a fan and in which the upper end of the heater is formed with sloping surfaces to increase the heating surface thereof.

A further object of the invention is to provide an improved hot air heater having sloping surfaces in the upper end in which the heater is of a simple and economical construction.

With these and other objects and advantages in view the invention embodies a heater having a housing with a dividing partition forming two compartments with a burner in the lower end of one compartment and a fan in the other compartment and in which the upper ends of the compartments are formed with sloping surfaces to facilitate circulation of air through the heater.

Other features and advantages of the invention will appear from the following description taken in connection with the drawing, wherein:-

Figure 1 is a front elevational view of the improved heater with the intermediate part of the heater broken away and with the upper section shown in section.

Figure 2 is a cross section through the upper part of the heater taken on line 2-2 of Fig. 1.

Figure 3 is a sectional plan showing one side of the heater taken on line 3-3 of Fig. 1.

Figure 4 is a cross section through the upper part of the heater, similar to the section shown in Fig. 2 and showing a modification wherein a heating duct extends upwardly from the top of the housing.

Referring now to the drawing wherein like reference characters denote corresponding parts the improved heater of this invention includes a base having upwardly extended end walls 11 and 12, a front wall 13, a rear wall 14 and a dividing partition 15 whereby the housing is divided into a cold air return compartment 16 and a heating chamber or combustion chamber 17. The section 17 is provided with a burner 18 and hot air ducts 19, 20 and 21 extend from the upper end and the cold air return compartment 16 is provided with a fan 22 and cold air return ducts 23 and 24, the ducts 24 being positioned at the front and rear of the housing.

The lower part or base section of the housing extends upwardly to a shoulder 25 and from the shoulder 25 the front, rear, and end walls are offset in relation to the 0 corresponding walls of the lower section providing sections of reduced area at the upper end of the housing.

The upper end of the compartment 17 above the burner 18 is V-shaped in cross section, as shown in Fig. 2 the top being formed with sloping surfaces or bafiles 26 and 27 and a similar sloping surface or bafile 28 is provided at the outer end whereby hot air is directed into the duct 20. The top of the compartment may be pro vided with a lining of asbestos, or other suitable insulating material, as indicated by the numeral 29.

The compartment 16 is provided with a similar section at the upper end with a sloping surface or baflle 30 at the end and 'with sloping side surfaces similar to the surfaces or baflles 26 and 27 extended upwardly from the point 31.

By this means cold air returning to the ducts 23 and 24 is directed downwardly as indicated by the arrows 32 into the compartment 16 and from the compartment 16 the air is circulated by the fan 22 into the compart ment 17 through which the air, following the path of the arrows 33 is directed outwardly through the ducts 19, 20 and 21.

By this means the air contacts the sloping surfaces on the inner surface of the top instead of the conventional fiat surface at the upper end of the heating chamber.

In the design illustrated in Fig. 4 the housing of the compartment 17 is formed with a lower section 34 an upper section 35, which is of reduced area in cross section, and a top having inclined surfaces 36 and 37 and a sloping end surface, similar to the surface 28, shown in Fig. 1. By this means air is directed outwardly in the path of the arrows from the combustion chamber into the ducts which carry the air to the rooms and the like.

In this design the top of the housing is provided with a vertically disposed duct 38 having a damper 39 therein and the damper, which is pivotally mounted by a shaft 40 in the upper section of the housing may be actuated by an extended end of the shaft whereby the duct 38 may be opened or closed, as may be desired. In this design the top is also provided with a lining 41, of asbestos or the like.

With the parts arranged in this manner air is circulated through the two compartments of the housing with the cold air returning through the ducts 23 and 24 and with the temperature of the air being raised by the burner 18 in the compartment 17. The heated air is directed outwardly through the ducts 19, 20 and 21 by the sloping surfaces on the under side of the upper end or top of the heating compartment of the housing.

It will be understood that modifications, within the scope of the appended claim, may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

In a heater, a horizontally disposed base, a housing including a pair of spaced parallel vertically disposed end walls extending upwardly from said base, a front wall and a rear wall extending upwardly from said base, a vertically disposed partition interposed between said pair of end walls and defining a cold air compartment and a heating chamber, the lower end of said partition being spaced above said base whereby said compartment and chamber communicate with each other, a heating means positioned in said heating chamber, a fan mounted in said cold air compartment, a first, second and third hot air duct extending from the upper end of said front, rear and end walls and communicating with said heating chamber, a first, second and third cold air return duct extending from the front, rear and end walls of said housing and communicating with said cold air compartment, said heating chamber and cold air compartment each having in their upper end a set of bafiles including a first, second and third inclined bafile, the upper edges of said baffies being secured to the inner surface of the front, rear and end walls of the cold air compartment and of the heating chamber respectively at points contiguous to the tops of the ducts, the baflies of each set extending downwardly and inwardly and being secured together at their lower edges, and a layer of insulation arranged contiguous to the upper surface of each of said baflles.

References Cited in the file of this patent UNITED STATES PATENTS Tim'ms Sept. Grazier Apr. 28, 

